139392789 has 8 divisors (see below), whose sum is σ = 186348960. Its totient is φ = 92682576.

The previous prime is 139392761. The next prime is 139392791. The reversal of 139392789 is 987293931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139392789 - 2²⁵ = 105838357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139392739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60162 + ... + 62435.

It is an arithmetic number, because the mean of its divisors is an integer number (23293620).

Almost surely, 2^139392789 is an apocalyptic number.

It is an amenable number.

139392789 is a deficient number, since it is larger than the sum of its proper divisors (46956171).

139392789 is a wasteful number, since it uses less digits than its factorization.

139392789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122979.

The product of its digits is 734832, while the sum is 51.

The square root of 139392789 is about 11806.4723351220. The cubic root of 139392789 is about 518.4976223556.

The spelling of 139392789 in words is "one hundred thirty-nine million, three hundred ninety-two thousand, seven hundred eighty-nine".